18218884573440 has 1152 divisors, whose sum is σ = 70599040512000. Its totient is φ = 4433541267456.

The previous prime is 18218884573427. The next prime is 18218884573447. The reversal of 18218884573440 is 4437548881281.

18218884573440 is a `hidden beast` number, since 1 + 8 + 2 + 1 + 8 + 88 + 45 + 73 + 440 = 666.

It is a tau number, because it is divible by the number of its divisors (1152).

It is not an unprimeable number, because it can be changed into a prime (18218884573447) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2061188541 + ... + 2061197379.

Almost surely, 2^{18218884573440} is an apocalyptic number.

18218884573440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18218884573440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35299520256000).

18218884573440 is an abundant number, since it is smaller than the sum of its proper divisors (52380155938560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18218884573440 is a wasteful number, since it uses less digits than its factorization.

18218884573440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9004 (or 8984 counting only the distinct ones).

The product of its (nonzero) digits is 55050240, while the sum is 63.

The spelling of 18218884573440 in words is "eighteen trillion, two hundred eighteen billion, eight hundred eighty-four million, five hundred seventy-three thousand, four hundred forty".